Review Conceptual Example 6 as background for this problem. A car is traveling to the left, which is the negative direction. The direction of travel remains the same throughout this problem. The car's initial speed is 22.7 m/s, and during a 4.65-second interval, it changes to a final speed of (a)33.2 m/s and (b)15.8 m/s. In each case, find the acceleration (magnitude and algebraic sign). (a) Number i (b) Number i Units Units

Review Conceptual Example 6 as background for this problem. A car is traveling to the left, which is the negative direction. The direction of travel remains the same throughout this problem. The car's initial speed is 22.7 m/s, and during a 4.65-second interval, it changes to a final speed of (a)33.2 m/s and (b)15.8 m/s. In each case, find the acceleration (magnitude and algebraic sign). (a) Number i (b) Number i Units Units

Name: Review Conceptual Example 6 as background for this problem. A car is
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Description: Review Conceptual Example 6 as background for this problem. A car is traveling to the left, which is the negative direction. Thedirection of travel remains the same throughout this problem. The car's initial speed is 22.7 m/s, and during a 4.65-seco

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter2: Motion In One Dimension

Section: Chapter Questions

Problem 2.81CP: A blue car of length 4.52 m is moving north on a roadway (hat intersects another perpendicular...

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At an air show, a jet plane has velocity components vx= 695km/h and v y =415km/h at time 4.35 s and v x =938km/h and V y =365km/h at time 7.52s. A)For this time interval, find the xxx component of the plane's average acceleration. b)For this time interval, find the yyy component of the plane's average acceleration. C)For this time interval, find the magnitude of its average acceleration. D)For this time interval, find the direction of its average acceleration.
A particle moves along the x axis according to the equation x = 2.00 + 3.00t 1.00t2, where x is in meters and t is in seconds. At t = 3.00 s, find (a) the position of the particle, (b) its velocity, and (c) its acceleration.
A blue car of length 4.52 m is moving north on a roadway (hat intersects another perpendicular roadway (Fig. P2.81, page 58). The width of the intersection from near edge to far edge is 28.0 m. The blue car has a constant acceleration of magnitude 2.10 m/s2 directed south. The time interval required for the nose of the blue car to move from the near (south) edge of the intersection to the north edge of the intersection is 3.10 s. (a) How far is the nose of the blue car from the south edge of the intersection when it stops? (b) For what time interval is any part of the blue car within the boundaries of the intersection? (c) A red car is at rest on the perpendicular intersecting roadway. As the nose of the blue car enters the intersection, the red car starts from rest and accelerates east at 5.60 m/s2. What is the minimum distance from the near (west) edge of the intersection at which the nose of the red car can begin its motion if it is to enter the intersection alter the blue car has entirely left the intersection? (d) II the red car begins its motion at the position given by the answer to pan (c), with what speed does it enter the intersection?
On a spacecraft two engines fire for a time of 567 s. One gives the craft an acceleration in the x direction of ax = 4.80 m/s2, while the other produces an acceleration in the y direction of ay = 7.52 m/s2. At the end of the firing period, the craft has velocity components of vx = 3751 m/s and vy = 4834 m/s. Calculate the magnitude of the initial velocity.
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A particle moves along a straight line such that its position is defined by s=(t^2−6t+5)m. (a) Determine the average velocity of the particle when t = 7.9 s . Express your answer to three significant figures and include the appropriate units. The answer is not 9.8 m/s (b) Determine the average speed of the particle when t = 7.9 s. Express your answer to three significant figures and include the appropriate units. The answer is not 1.9 m/s (c) Determine the acceleration of the particle when t = 7.9 s. Express your answer to three significant figures and include the appropriate units.
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On a one lane road, a person driving a car at v1 = 58 mi/h suddenly notices a truck 1.1 mi in front of him. That truck is moving in the same direction at v2 = 35 mi/h. In order to avoid a collision, the person has to reduce the speed of his car to v2 during time interval Δt. The smallest magnitude of acceleration required for the car to avoid a collision is a. During this problem, assume the direction of motion of the car is the positive direction. 1. Use the expressions you entered in parts (c) and (f) and enter an expression for a in terms of d, v1, and v2. a = ( v2 - v1 )/Δt Δt = ( 2 ) ( d )/( v1 - v2 ) 2. Calculate the value of a in meters per second squared.
At t = 0, one toy car is set rolling on a straight track with initial position 13.0 cm, initial velocity -2.8 cm/s, and constant acceleration 2.30 cm/s2. At the same moment, another toy car is set rolling on an adjacent track with initial position 9.5 cm, initial velocity 6.00 cm/s, and constant zero acceleration. At t = 0, one toy car is set rolling on a straight track with initial position 13.0 cm, initial velocity -2.8 cm/s, and constant acceleration 2.30 cm/s2. At the same moment, another toy car is set rolling on an adjacent track with initial position 9.5 cm, initial velocity 6.00 cm/s, and constant zero acceleration. (a) At what time, if any, do the two cars have equal speeds? (b) What are their speeds at that time?
The following equations give the position x(t) of a particle in four situations (in each equation, x is in meters, tis in seconds, and t> 0): (1) x = 3t - 4: (2) x = -5t3 + 4t2 + 6: (3) x = 2/t2 - 4/t; (4) x = 5t2 3. (a) In which situation is the acceleration a of the particle constant?
A dog running in an open field has components of velocity vx = 2.6 m/s and vy = -1.2 m/s at time t1 = 11.7 s . For the time interval from t1 = 11.7 s to t2 = 22.8 s, the average acceleration of the dog has magnitude 0.49 m/s^2 and direction 25.0 measured from the +x−axis toward the +y−axis. At t2, what is the x component, y component, and magnitude of the dog's velocity? What is the direction of the dogs velocity?